Game night at your place! Be sure to stock up on the latest party games before basically all of humanity descends upon your place and expects you to entertain them. These social games are especially good for getting different groups of people to interact (even introverts). These tend to emphasize quick-fire play with fast rounds, allow players to come and go at will, and are easy to learn, simple to play. So if you want to inject a little guaranteed fun to your party, start here.